23787815645 has 64 divisors (see below), whose sum is σ = 33235107840. Its totient is φ = 16180819200.

The previous prime is 23787815609. The next prime is 23787815657. The reversal of 23787815645 is 54651878732.

It is a de Polignac number, because none of the positive numbers 2^k-23787815645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8708930 + ... + 8711660.

It is an arithmetic number, because the mean of its divisors is an integer number (519298560).

Almost surely, 2^23787815645 is an apocalyptic number.

It is an amenable number.

23787815645 is a deficient number, since it is larger than the sum of its proper divisors (9447292195).

23787815645 is a wasteful number, since it uses less digits than its factorization.

23787815645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946.

The product of its digits is 11289600, while the sum is 56.

The spelling of 23787815645 in words is "twenty-three billion, seven hundred eighty-seven million, eight hundred fifteen thousand, six hundred forty-five".